Задача 31672.

The vacuum diode, in which the anode and cathode are parallel plates, operates in the mode when the relation I = cU3 / 2 is maintained between current and voltage (where c is a constant value). How many times will the force acting on the anode due to electron impact increase if the diode voltage is increased 3 times? The initial velocity of the emitted electrons is assumed to be zero.

Detailed solution with a brief record of the conditions, formulas and laws used in the decision, the conclusion of the calculation formula and the answer.
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